Fix variable problems found by packer

Author: dpvc

unpacked/jax/input/TeX/jax.js

@@ -1581,7 +1581,7 @@
       var w = this.GetDimen(name),
           h = this.GetDimen(name),
           d = this.GetDimen(name);
-      var mml, def = {width:w, height:h, depth:d};
+      var def = {width:w, height:h, depth:d};
       if (style !== 'blank') {
         def.mathbackground = (this.stack.env.color || "black");
       }

unpacked/jax/output/CommonHTML/jax.js

@@ -1005,10 +1005,10 @@
           //  Remap combining characters to non-combining versions since Safari
           //  handles them differently from everyone else.  (#1709)
           //
-          var char = this.flushText(node,state);
+          var chr = this.flushText(node,state);
           var r = (FONT[item.n]||font[item.n])[4] - (C[4] - C[2]);
-          char.style.marginLeft = CHTML.Em(-C[2]-r);
-          if (r < 0) char.style.marginRight = CHTML.Em(-r);
+          chr.style.marginLeft = CHTML.Em(-C[2]-r);
+          if (r < 0) chr.style.marginRight = CHTML.Em(-r);
         }
       },
       //